/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.plan.planner.plan.node.source;

import com.google.common.collect.ImmutableList;
import org.apache.iotdb.common.rpc.thrift.TRegionReplicaSet;
import org.apache.iotdb.commons.path.AlignedPath;
import org.apache.iotdb.commons.path.PartialPath;
import org.apache.iotdb.commons.path.PathDeserializeUtil;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.*;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.process.AggregationNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.parameter.AggregationDescriptor;
import org.apache.iotdb.db.mpp.plan.planner.plan.parameter.GroupByTimeParameter;
import org.apache.iotdb.db.mpp.plan.statement.component.Ordering;
import org.apache.iotdb.tsfile.read.filter.basic.Filter;
import org.apache.iotdb.tsfile.read.filter.factory.FilterFactory;
import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils;

import javax.annotation.Nullable;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

public class AlignedSeriesAggregationScanNode extends SeriesAggregationSourceNode {

    // The paths of the target series which will be aggregated.
    private final AlignedPath alignedPath;

    // The id of DataRegion where the node will run
    private TRegionReplicaSet regionReplicaSet;

    public AlignedSeriesAggregationScanNode(
            PlanNodeId id,
            AlignedPath alignedPath,
            List<AggregationDescriptor> aggregationDescriptorList) {
        super(id, aggregationDescriptorList);
        this.alignedPath = alignedPath;
        this.aggregationDescriptorList =
                AggregationNode.getDeduplicatedDescriptors(aggregationDescriptorList);
    }

    public AlignedSeriesAggregationScanNode(
            PlanNodeId id,
            AlignedPath alignedPath,
            List<AggregationDescriptor> aggregationDescriptorList,
            Ordering scanOrder,
            @Nullable GroupByTimeParameter groupByTimeParameter) {
        this(id, alignedPath, aggregationDescriptorList);
        this.scanOrder = scanOrder;
        this.groupByTimeParameter = groupByTimeParameter;
    }

    public AlignedSeriesAggregationScanNode(
            PlanNodeId id,
            AlignedPath alignedPath,
            List<AggregationDescriptor> aggregationDescriptorList,
            Ordering scanOrder,
            @Nullable Filter timeFilter,
            @Nullable GroupByTimeParameter groupByTimeParameter,
            TRegionReplicaSet dataRegionReplicaSet) {
        this(id, alignedPath, aggregationDescriptorList, scanOrder, groupByTimeParameter);
        this.timeFilter = timeFilter;
        this.regionReplicaSet = dataRegionReplicaSet;
    }

    public AlignedPath getAlignedPath() {
        return alignedPath;
    }

    public Ordering getScanOrder() {
        return scanOrder;
    }

    @Nullable
    public Filter getTimeFilter() {
        return timeFilter;
    }

    public void setTimeFilter(@Nullable Filter timeFilter) {
        this.timeFilter = timeFilter;
    }

    @Nullable
    public GroupByTimeParameter getGroupByTimeParameter() {
        return groupByTimeParameter;
    }

    @Override
    public void open() throws Exception {
    }

    @Override
    public TRegionReplicaSet getRegionReplicaSet() {
        return regionReplicaSet;
    }

    @Override
    public void setRegionReplicaSet(TRegionReplicaSet regionReplicaSet) {
        this.regionReplicaSet = regionReplicaSet;
    }

    @Override
    public void close() throws Exception {
    }

    @Override
    public List<PlanNode> getChildren() {
        return ImmutableList.of();
    }

    @Override
    public int allowedChildCount() {
        return NO_CHILD_ALLOWED;
    }

    @Override
    public void addChild(PlanNode child) {
        throw new UnsupportedOperationException(
                "no child is allowed for AlignedSeriesAggregationScanNode");
    }

    @Override
    public PlanNode clone() {
        return new AlignedSeriesAggregationScanNode(
                getPlanNodeId(),
                getAlignedPath(),
                getAggregationDescriptorList(),
                getScanOrder(),
                getTimeFilter(),
                getGroupByTimeParameter(),
                getRegionReplicaSet());
    }

    @Override
    public List<String> getOutputColumnNames() {
        return aggregationDescriptorList.stream()
                .map(AggregationDescriptor::getOutputColumnNames)
                .flatMap(List::stream)
                .collect(Collectors.toList());
    }

    @Override
    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
        return visitor.visitAlignedSeriesAggregationScan(this, context);
    }

    @Override
    protected void serializeAttributes(ByteBuffer byteBuffer) {
        PlanNodeType.ALIGNED_SERIES_AGGREGATE_SCAN.serialize(byteBuffer);
        alignedPath.serialize(byteBuffer);
        ReadWriteIOUtils.write(aggregationDescriptorList.size(), byteBuffer);
        for (AggregationDescriptor aggregationDescriptor : aggregationDescriptorList) {
            aggregationDescriptor.serialize(byteBuffer);
        }
        ReadWriteIOUtils.write(scanOrder.ordinal(), byteBuffer);
        if (timeFilter == null) {
            ReadWriteIOUtils.write((byte) 0, byteBuffer);
        } else {
            ReadWriteIOUtils.write((byte) 1, byteBuffer);
            timeFilter.serialize(byteBuffer);
        }
        if (groupByTimeParameter == null) {
            ReadWriteIOUtils.write((byte) 0, byteBuffer);
        } else {
            ReadWriteIOUtils.write((byte) 1, byteBuffer);
            groupByTimeParameter.serialize(byteBuffer);
        }
    }

    @Override
    protected void serializeAttributes(DataOutputStream stream) throws IOException {
        PlanNodeType.ALIGNED_SERIES_AGGREGATE_SCAN.serialize(stream);
        alignedPath.serialize(stream);
        ReadWriteIOUtils.write(aggregationDescriptorList.size(), stream);
        for (AggregationDescriptor aggregationDescriptor : aggregationDescriptorList) {
            aggregationDescriptor.serialize(stream);
        }
        ReadWriteIOUtils.write(scanOrder.ordinal(), stream);
        if (timeFilter == null) {
            ReadWriteIOUtils.write((byte) 0, stream);
        } else {
            ReadWriteIOUtils.write((byte) 1, stream);
            timeFilter.serialize(stream);
        }
        if (groupByTimeParameter == null) {
            ReadWriteIOUtils.write((byte) 0, stream);
        } else {
            ReadWriteIOUtils.write((byte) 1, stream);
            groupByTimeParameter.serialize(stream);
        }
    }

    public static AlignedSeriesAggregationScanNode deserialize(ByteBuffer byteBuffer) {
        AlignedPath alignedPath = (AlignedPath) PathDeserializeUtil.deserialize(byteBuffer);
        int aggregateDescriptorSize = ReadWriteIOUtils.readInt(byteBuffer);
        List<AggregationDescriptor> aggregationDescriptorList = new ArrayList<>();
        for (int i = 0; i < aggregateDescriptorSize; i++) {
            aggregationDescriptorList.add(AggregationDescriptor.deserialize(byteBuffer));
        }
        Ordering scanOrder = Ordering.values()[ReadWriteIOUtils.readInt(byteBuffer)];
        byte isNull = ReadWriteIOUtils.readByte(byteBuffer);
        Filter timeFilter = null;
        if (isNull == 1) {
            timeFilter = FilterFactory.deserialize(byteBuffer);
        }
        isNull = ReadWriteIOUtils.readByte(byteBuffer);
        GroupByTimeParameter groupByTimeParameter = null;
        if (isNull == 1) {
            groupByTimeParameter = GroupByTimeParameter.deserialize(byteBuffer);
        }
        PlanNodeId planNodeId = PlanNodeId.deserialize(byteBuffer);
        return new AlignedSeriesAggregationScanNode(
                planNodeId,
                alignedPath,
                aggregationDescriptorList,
                scanOrder,
                timeFilter,
                groupByTimeParameter,
                null);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        if (!super.equals(o)) {
            return false;
        }
        AlignedSeriesAggregationScanNode that = (AlignedSeriesAggregationScanNode) o;
        return alignedPath.equals(that.alignedPath)
                && aggregationDescriptorList.equals(that.aggregationDescriptorList)
                && scanOrder == that.scanOrder
                && Objects.equals(timeFilter, that.timeFilter)
                && Objects.equals(groupByTimeParameter, that.groupByTimeParameter)
                && Objects.equals(regionReplicaSet, that.regionReplicaSet);
    }

    @Override
    public int hashCode() {
        return Objects.hash(
                super.hashCode(),
                alignedPath,
                aggregationDescriptorList,
                scanOrder,
                timeFilter,
                groupByTimeParameter,
                regionReplicaSet);
    }

    @Override
    public PartialPath getPartitionPath() {
        return alignedPath;
    }

    @Override
    public Filter getPartitionTimeFilter() {
        return timeFilter;
    }

    @Override
    public String toString() {
        return String.format(
                "AlignedSeriesAggregationScanNode-%s:[SeriesPath: %s, Descriptor: %s, DataRegion: %s]",
                this.getPlanNodeId(),
                this.getAlignedPath().getFormattedString(),
                this.getAggregationDescriptorList(),
                PlanNodeUtil.printRegionReplicaSet(getRegionReplicaSet()));
    }
}
